After we developed the initial version of the app, we tested it on 10 anonymous users in order to obtain primary feedback regarding the use of the app. We explained the users the basic idea of the app and asked them to try it on their own, and to describe us the actions they are doing, while each user was asked to describe the things that interferes him and suggest things he would do otherwise. It was very interesting to see the way the users interact with the game and to hear their feedback.